Swingletree or doubletree.



No. 757,866. PATENTED APR.19, 1904.

E. HAIMAN. SWINGLBTREE 0R DOUBLE'TRBE APPLIOATION FILED JAN. 15. 1904.

N0 MODEL.

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Patented April 19, 1904.

UNITED STATES PATENT OFFICE.

ELIAS HAIMAN, OF CLEVELAND, OHIO.

SWINGLETREE OR DOUBLETREE.

SPECIFICATION forming part of Letters Patent No. 757,866, dated April19, 1904.

Application filed January 15, 1904. Serial No. 189,092. (No model.)

To (071/ whmn it may concern:

Be it known that I, ELIAs HAIMAN, a citizen of the United States,residing at Cleveland, in the county of Ouyahoga and State of Ohio, haveinvented certain new an d useful Improvements in Swingletrees orDoubletrees; and I do declare that the following is a full, clear, andexact description of the invention, which will enable others skilled inthe art to which it appertains to make and use the same.

My invention relates to swingletrees and doubletrees; and the object ofthe invention is to provide a sheet-metal tree 01: bar for, draftpurposes, either single or double, as may be wanted, and which isprovided with integral hooks at its ends and constructed wholly in onepiece, substantially as shown and described, and particularly pointedout in the claims.

In the accompanying drawings, Figure 1 is a plan view of what may beregarded as a swingletree or doubletree, the only difference in any casebeing one of size. Fig. 2 is an enlarged end view of the tree or barlooking from the rear; and Fig. 3 is a cross-section, enlarged, on lineY Y, Fig. 1. Fig. 4 is a perspective view of one end of the tree or barcorresponding to Fig. 1. Fig. 5 is a crosssection on line X X, Fig. 1.

The invention as thus shown belongs to the class in which bothswingletrees and doubletrees are developed from a piece of sheet metal,usually steel, and which is first cut to the requisite size and shape bymeans of suitable dies and then bent lengthwise, in its body portionparticularly, to a substantially U shape in cross-section. Ordinarilyand in this instance the part A, referred to as abar or tree, has theproportional cross-sectional depth and width of body substantially asshown; but there may be still more metal thrown into the middle portionof the tree, if desired, and the ends are cut to the requisite shape toform the reversely or rearwardly curved hooks 2, substantially as shown.These hooks are especially designed to prevent possible accidentaldisconnecting or releasing of the traces or trace-chains O when they areslack and ordinarily would be liable to get loose, and the constructionor shape of said hooks and their relation to the body of the tree issuch as to absolutely prevent release of the traces by accident orotherwise except as purposely I released by hand. To this end the saidhooks are made double or double-sided, bringing one side or portion fromeach corresponding side of the tree, and each side is an independentportion until the two are brought together to form a single hook, asshown. To do this, the extremities of the body of the tree arecompressed or contracted in their rear portion, as seen at 4, so as toform the flat-sided solid shank 5 of the hook where the draft or pulloccurs throughtraces or chains O.

The contracting or bringing together of the tree at this point is not soabrupt as to strain the metal and serves rather to give it strength andfortify the hook and body at the point of greatest strain, and thestrength of the hook is all that can possibly be needed to meet thedemands of the draft as well as to permit wear by continued usage. Fromthe immediate draft portion 5 of the hook the remaining portion curvesaround to the rear of the tree and the point or end thereof has a rivet6, connecting its two sides, and it lies in such relation to theadjacent edges 7 of the body that in plan they are in substantially thesame plane, Fig. 1, while horizontally the point lies equally betweensaid edges. Then in addition the hook is of such thickness, taking thetwo sides thereof together, and the edges 7 of the body are so nearthereto relatively, Fig. 2, that the chain or trace C cannot be detachedwithout inclining the engaged link, as seen in Fig. 2; but having thelink inclined and presumably of the usual size and kind the link isreleased by sliding it off the point of the hook into the space betweenedges or sides 7 of the body, and this release occurs not only oppositethe point of draft to the rear, but at one side therefrom inward withinthe sides of the tree and by inclining the link in addition. Obviouslythis makes a connection which is proof against accidental release andfrom which it is practically impossible that release should occur exceptby hand.

At its middle the tree has a fixed link or clevis D, engaged by a riveta through the flattened ends thereof andsides of the tree, and the saidoverlapped ends of the link fill as the rear edges of the bar and midwaybetween the planes of said edges horizontally, substantially asdescribed.

2. A swingletree or doubletree of substantially U shape incross-section. and having double-sided hooks at each end integral withthe respective sides of the tree and the extremities of said hooksterminating at the rear of the tree and substantially equidistant fromthe adjacent edges thereof and relatively between the planes of saidedges, substantially as described. 7 I

3. A swingletree or doubletreeformed of sheet metal in substantially Ushape in crosssection and having integral hooks at each end, the ends ofthe body of the tree being contracted at the base of the hook and thepoint of the hook lying substantially midway between the rear edges ofthe tree behind said contracted portion, substantially as described. '4.A swingletree or doubletree of sheet metal and substantially U shape incross-section, the ends of the tree having hooks bent around from thefront to the rear thereof and lying in a plane midway between the planesof the sides of the tree horizontally, said hooks formed each of twoparts lying flat upon each other and fastened together at theirextremity, substantially as described.

5. A swingletree or doubletree of sheet I metal substantially U shape incross-section and having reversely-curved integral hooks at each end,and a link midway the length of the tree having flattened ends pressedtogether and filling the space between the sides of the tree, and arivet locking said link and tree together, thereby securing said linkand strengthening the tree, substantially as described.

6. A whiflietree of substantially U shape in cross-section and havingits extremities flat- .tened and formed into hooks, said hooks beingreversely curved from the front rearward and the points of the hooksextending toward the rear of the whifl'letree, substantially asdescribed. i

In testimony whereof I sign this specification in the presence of twowitnesses.

ELIAS HAIMAN.

Witnesses:

R. B. MOSER, (J. A. SELL.

